PrepaymentCheck::correlatePrices

private function correlatePrices($result)
{
	$paymentSum = 0;
	foreach ($result['PAYMENTS'] as $payment)
	{
		$paymentSum += $payment['SUM'];
	}

	/** @var Order $order */
	$order = $result['ORDER'];

	$rate = $paymentSum / $order->getPrice();

	$countProductPositions = count($result['PRODUCTS']);
	$countDeliveryPositions = $result['DELIVERY'] ? count($result['DELIVERY']) : 0;

	if ($countDeliveryPositions === 0)
	{
		$totalSum = 0;
		for ($i = 0; $i < $countProductPositions - 1; $i++)
		{
			$sum = PriceMaths::roundPrecision($result['PRODUCTS'][$i]['SUM'] * $rate);
			$totalSum += $sum;
			$result['PRODUCTS'][$i]['SUM'] = $sum;

			$price = PriceMaths::roundPrecision($sum / $result['PRODUCTS'][$i]['QUANTITY']);
			$result['PRODUCTS'][$i]['BASE_PRICE'] = $result['PRODUCTS'][$i]['PRICE'] = $price;


			if (isset($result['PRODUCTS'][$i]['DISCOUNT']))
			{
				unset($result['PRODUCTS'][$i]['DISCOUNT']);
			}
		}

		if (isset($result['PRODUCTS']))
		{
			$lastElement = $countProductPositions - 1;
			$result['PRODUCTS'][$lastElement]['SUM'] = PriceMaths::roundPrecision($paymentSum - $totalSum);
			$price = PriceMaths::roundPrecision($result['PRODUCTS'][$lastElement]['SUM'] / $result['PRODUCTS'][$lastElement]['QUANTITY']);
			$result['PRODUCTS'][$lastElement]['BASE_PRICE'] = $result['PRODUCTS'][$lastElement]['PRICE'] = $price;

			if (isset($result['PRODUCTS'][$lastElement]['DISCOUNT']))
			{
				unset($result['PRODUCTS'][$lastElement]['DISCOUNT']);
			}
		}
	}
	else
	{
		$totalSum = 0;
		for ($i = 0; $i < $countProductPositions; $i++)
		{
			$sum = PriceMaths::roundPrecision($result['PRODUCTS'][$i]['SUM'] * $rate);
			$totalSum += $sum;
			$result['PRODUCTS'][$i]['SUM'] = $sum;

			$price = PriceMaths::roundPrecision($sum / $result['PRODUCTS'][$i]['QUANTITY']);
			$result['PRODUCTS'][$i]['BASE_PRICE'] = $result['PRODUCTS'][$i]['PRICE'] = $price;

			if (isset($result['PRODUCTS'][$i]['DISCOUNT']))
			{
				unset($result['PRODUCTS'][$i]['DISCOUNT']);
			}
		}

		if ($countDeliveryPositions === 1)
		{
			$result['DELIVERY'][0]['SUM'] = PriceMaths::roundPrecision($paymentSum - $totalSum);
			$price = PriceMaths::roundPrecision($result['DELIVERY'][0]['SUM'] / $result['DELIVERY'][0]['QUANTITY']);
			$result['DELIVERY'][0]['BASE_PRICE'] = $result['DELIVERY'][0]['PRICE'] = $price;

			if (isset($result['DELIVERY'][0]['DISCOUNT']))
			{
				unset($result['DELIVERY'][0]['DISCOUNT']);
			}
		}
		else
		{
			for ($i = 0; $i < $countDeliveryPositions - 1; $i++)
			{
				$sum = PriceMaths::roundPrecision($result['DELIVERY'][$i]['SUM'] * $rate);
				$totalSum += $sum;
				$result['DELIVERY'][$i]['SUM'] = $sum;

				$price = PriceMaths::roundPrecision($sum / $result['DELIVERY'][$i]['QUANTITY']);
				$result['DELIVERY'][$i]['BASE_PRICE'] = $result['DELIVERY'][$i]['PRICE'] = $price;

				if (isset($result['DELIVERY'][$i]['DISCOUNT']))
				{
					unset($result['DELIVERY'][$i]['DISCOUNT']);
				}
			}

			if (isset($result['DELIVERY']))
			{
				$lastElement = $countDeliveryPositions - 1;
				$result['DELIVERY'][$lastElement]['SUM'] = PriceMaths::roundPrecision($paymentSum - $totalSum);
				$price = PriceMaths::roundPrecision($result['DELIVERY'][$lastElement]['SUM'] / $result['DELIVERY'][$lastElement]['QUANTITY']);
				$result['DELIVERY'][$lastElement]['BASE_PRICE'] = $result['DELIVERY'][$lastElement]['PRICE'] = $price;

				if (isset($result['DELIVERY'][$lastElement]['DISCOUNT']))
				{
					unset($result['DELIVERY'][$lastElement]['DISCOUNT']);
				}
			}
		}
	}

	return $result;
}